Experimental investigation of tribological performance of laser textured stainless steel rings

Qiu, Yibin; Khonsari, M. M.

doi:10.1016/j.triboint.2011.01.003

Cited by 194 publications

(125 citation statements)

References 12 publications

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“…Most experiments were conducted with traditional tribometers (unidirectional pinon-disc [11][12][13][14][15][16] or reciprocating sliding [17][18][19][20][21][22][23][24] tests), while other studies were conducted on real components, including journal bearings [25] thrust bearings [26][27][28] and mechanical seals [29][30][31]. To date, various surface texturing techniques have already been introduced, such as laser surface texturing (LST); reactive ion etching (RIE); embossing technique; "Lithographie, Galvanoformung, Abformung" (LIGA) process; abrasive jet machining (AJM), electrolytic etching, and so on.…”

Section: Introductionmentioning

confidence: 99%

A Novel Surface Texture Shape for Directional Friction Control

Lu¹,

Wood²,

Gee

et al. 2018

Tribol Lett

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An experimental study is presented to evaluate the influence of anisotropically shaped textures on the behaviour of sliding friction and sensitivity to sliding direction. The plate samples were textured with triangular sloped dimples using an ultrafast laser surface texturing technique. Reciprocating cylinder-on-plate tests were conducted with steel sliding pairs using mineral base oil as a lubricant to compare the tribological performance of reference non-textured specimen and dimpled samples. The dimples were designed with varying converging angles in the transverse y-z plane and top-view x-y plane. In this study, no dimple was fully covered in the contact area since the dimples size is much larger than the Hertzian line contact width. Stribeck style dynamic friction curves across boundary, mixed and hydrodynamic lubrication regimes were used to determine the benefit or antagonism of texturing. Observation of the directional friction effect of the anisotropic textures indicated that the converging shapes are beneficial for friction reduction, and the dimpled specimens have a lower friction coefficient particular under prevailing boundary lubrication conditions. It was also found that the real contact length variation rate is a major factor controlling the local friction response. The sloped bottoms of the textures produce effective converging wedge action to generate hydrodynamic pressure and contribute to the overall directional friction effects.

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Section: Introductionmentioning

confidence: 99%

A Novel Surface Texture Shape for Directional Friction Control

Lu¹,

Wood²,

Gee

et al. 2018

Tribol Lett

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“…In addition, an analytical solution for the boundary of the film cavitation region was presented. A series of experiments were conducted primarily by Qiu and Khonsari [4,5], which made the formation of cavitation visualized in a dimple-enhanced seal-like structure. They observed that cavitation was not shown in all the dimples during the experiment and the generation and development of which was highly dependent upon the rotational speed.…”

Section: Introductionmentioning

confidence: 99%

Research on Cavitation Regions of Upstream Pumping Mechanical Seal Based on Dynamic Mesh Technique

Chen

et al. 2014

Advances in Mechanical Engineering

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In order to study the cavitation area of the Upstream Pumping Mechanical Seal, three-dimensional microgap inner flow field of the Upstream Pumping Mechanical Seal was simulated with multiphase flow cavitation model and dynamic mesh technique based on hydrodynamic lubrication theory. Furthermore, the simulated result was compared with the experimental data. The results show that the simulated result with the Zwart-Gerber-Belamri cavitation model was much closer to the experimental data. The area of cavitation inception mainly occurred at the concave side of the spiral groove and surrounding region without spiral grooves, which was nearly covered by the inner diameter to roots of grooves; in addition, the region near the surface of the stationary ring was primary cavitation location. The area of cavitation has little relationship with the medium pressure; however, it became larger following increasing rotating speed in the range of researched operating conditions. Moreover the boundary of cavitated area was transformed from smooth to rough, which occurred in similar film thickness. When cavitation number was decreasing, which was conducive to improving the lubrication performance of sealed auxiliary, it made the sealing stability decline.

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“…Some researchers have investigated the load-carrying capacity using ring-on-ring test rigs, for which the periodic boundary condition is adequate [1-4, 6-8, 11, 12]. Khonsari's group [6,12,26,27], Zhang et al [8], and Cross et al [11] have also theoretically estimated the positive load-carrying capacity using the JFO theory for the periodic boundary condition. However, the magnitude of the load-carrying capacity seems to be too small to cause improvement in the lubrication characteristics.…”

Section: Discussionmentioning

confidence: 99%

“…Hamilton et al [2] and Anno et al [3] observed cavitation patterns at artificial asperities of a contact area between a transparent glass disc and a stationary ring. In recent studies [6][7][8][9][10][11][12], many other researchers have observed cavitation in textured features.…”

Section: Introductionmentioning

confidence: 98%

On the Magnitude of Load-Carrying Capacity of Textured Surfaces in Hydrodynamic Lubrication

2015

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This paper investigates the magnitude of the load-carrying capacity enabled by textured feature in hydrodynamic lubrication. The numerical model is a two-dimensional fixed pad bearing with a single dimple. The Reynolds equation was numerically solved using the Elrod algorithm. Two boundary conditions at the inlet and outlet were compared: a periodic boundary condition and an atmospheric boundary condition. The load-carrying capacity for the atmospheric boundary condition is negative while that for the periodic boundary condition is positive when a dimple is located at the centre of the lubricated area. The atmospheric boundary condition, when a dimple is located on the inlet side and is opened to the outside, exhibits greater load-carrying capacity than that in the enclosed dimple case.

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Experimental investigation of tribological performance of laser textured stainless steel rings

Cited by 194 publications

References 12 publications

A Novel Surface Texture Shape for Directional Friction Control

A Novel Surface Texture Shape for Directional Friction Control

Research on Cavitation Regions of Upstream Pumping Mechanical Seal Based on Dynamic Mesh Technique

On the Magnitude of Load-Carrying Capacity of Textured Surfaces in Hydrodynamic Lubrication

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